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bneaves
01-27-2003, 03:19 PM
Has anyone put a 350X eng/trans on say a 250X 4-wheeler frame? 8)

350Xrider
01-27-2003, 03:24 PM
I have not done it before, however I know it is almost a direct bolt in. I think the only thing you have to do is notch the frame in one place to route the oil line correctly. I have the edition of ATV sport where they did this conversion. It is to the best of my knowledge one of the easiest conversions to perform.

theeechozen1
01-27-2003, 04:21 PM
Freaksfix has one, maybe he would be so kind as to answer some of your questions

Da_Catt
01-27-2003, 04:41 PM
there is a mount on the rear of the motor that needs to be cut. you can get a exhaust from powroll. my friend did this swap. powroll has a kit but my friend did not use it. he just got the exhaust from them. http://www.powroll.com/honda_atc_350x.htm

HemiChallenger71
01-27-2003, 05:03 PM
Freaksfix does not have a 250x with a 350 motor, he has a 350X converted to a 4 wheeler. I have herd of similar sawp, and the 350 motor into a 250r chassis of any sort i hear is easy as pie too.

theeechozen1
01-27-2003, 05:10 PM
are the 250r and 250x frames the same??

freaksfix
01-27-2003, 05:15 PM
No the R frames are bigger and stronger. The R frame looks to be the easyst..

theeechozen1
01-27-2003, 05:34 PM
I see your project has changed from a twin cylinder atc, to a four cylinder atc!! Are you trying to go one up on me!! J/K ;) Are you going to use a crotchrocket motor of some kind, or are you thinkin more along the lines of a kz550, or honda cb motor?? Just curious

OldSchoolin86
01-27-2003, 07:17 PM
The 350x motor to 250X/300EX frame is the easiest swap. The motors are very similar. There is more work involved when you try it with an R frame.

ATC crazy
01-27-2003, 07:53 PM
If you do the swap into a 250x chassis, you might want to consider a longer s-arm because it will constantly want to wheelie (I learned the hard way). My brothers friend has one and it is awesome :-P

Da_Catt
01-27-2003, 08:22 PM
the 350x shock and swingarm bolts on to the 250x. the shock is better , i don't know if the 350x swingarm is longer or not or if the axle is wider.

freaksfix
01-27-2003, 09:22 PM
I see your project has changed from a twin cylinder atc, to a four cylinder atc!! Are you trying to go one up on me!! J/K ;) Are you going to use a crotchrocket motor of some kind, or are you thinkin more along the lines of a kz550, or honda cb motor?? Just curious

:twisted: I got pissed at the sl350 motor, and figured no one was bitting on the CB550F i have for sale :twisted:

SpeedBump
01-27-2003, 09:38 PM
here is mine. It is a 1998 300EX with a 86 350X engine. I swapped the engines in less than 7hrs. If I would have had an exhaust, it would have been ridden at the end of the 7hrs. i couln't see buying a $460 exhaust at the time. I wasn't sure if I wanted to keep the engine in there or not. I ( with the help of a friend with a exhaust shop, made a exhaust for it in about 3hrs, that following saturday. All the was needed to do the swap, is Exhaust, file down the Oil supply banjo bolt ( goes to the head ) 1/8-1/4 inch for clearance, and cut off a 1 1/4 from the upper rear engine mount boss and make 2 spacers 9 one for front bottom, and one for top rear) The engines are VERY similar, in fact, the side cases will bolt on each other. I also used the NEW clutch from the 300ex engine, and put it in the 350x. Here are some pics of this machine.
http://users.adelphia.net/~cinnamonlou/pics/Craigonthe350ex.jpg

Also check this link to see some more pics
http://www.msnusers.com/Speedbump/shoebox.msnw

4cylinders
01-27-2003, 11:27 PM
try this on for size. here is my 250x. guess what engine this is. ;)

HemiChallenger71
01-27-2003, 11:34 PM
If I remember right you told us it's a CB 750. Bet that thing flies, and is more stable than the 3 wheeler LOL!!

4cylinders
01-27-2003, 11:56 PM
you got that one right!! you've been reading a lot lately. this is kinda like your car. do you like the hood scoop?

theeechozen1
01-28-2003, 12:17 PM
Are the 2 motors close enough that you could bolt a 350x top end onto a 300ex bottom end??

OldSchoolin86
01-28-2003, 08:59 PM
NO! The motors are a lot different inside.

wizzard
02-02-2003, 12:47 AM
POWEROLL make an engine swap kit for this www.poweroll.com or something like that

BLURR250X
02-08-2003, 02:22 PM
Does anyone have any step by step pics of the conversion on a 250X or 300EX?